Study of the influence of notch radii and temperature on the probability of failure: A methodology to perform a combined assessment

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Miguel Muñiz-Calvente (Author) Other; Adrián Álvarez-Vázquez (Author) Other; Sergio Cicero (Author) Other; José A. F. O. Correia (Author) FEUP; Abílio M. P. de Jesus (Author) FEUP; Sergio Blasón (Author) Other; Alfonso Fernández-Canteli (Author) Other; Filippo Berto (Author) Other

Journal

Title: Fatigue & Fracture of Engineering Materials & Structures

Vol. 42 No. 12

Pages: 2663-2673

ISSN: 8756-758X

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 6 Citations

Other information

Authenticus ID: P-00Q-WVB

DOI: 10.1111/ffe.13082

Abstract (EN): The fracture assessment of notched components based on cracked components approaches leads to over-conservative failure predictions. In the research literature, several approaches are proposed to overcome this problem using an apparent fracture toughness, KmatN. Nevertheless, most of these approaches are based on deterministic assumptions despite the large and variable scatter exhibited by KmatN for different notch radii (rho) or temperatures (T). This paper proposes a methodology for deriving a probabilistic KmatN-rho field including the effect of temperature on the failure of notched components. First, the theory of critical distances is applied to transform each apparent fracture toughness into the equivalent fracture toughness for rho = 0. Then, the temperature is supposed to act as a scale effect in the Weibull cumulative distribution function of the equivalent fracture toughness, and the corresponding scale effect function is derived. Finally, the applicability of the proposed methodology is illustrated by an example using two ferritic-pearlitic steels: S275JR and S355J2.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11